Escapement mechanism for type-writing machines.



J. A. RONGHETII.

v ESOAPEMBNT MECHANISM FOR TYPE WRITING MACHINES.

APPLIOATIOH IILBD APBJS, 1209.

1,049,767. Patented Jan. 7, 1913.

8 SHEETS-SHEET 1.

' J. AuRbNGHETTL. ESGAPEMBNT MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED APB-19. 1909- 1,049,767.

3 SHEETS-SHEET 2- ITNE A c a B? INVENTUB M AM A UFNEYS.

Patented Jan. 7, 1913.

J. A. RONGHETTI.

BSOAPBMENT MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION nun APR. 10, 1909.

1,049,767. Patented Jan. 7, 1913.

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f cumin sTAtrEs PATENT o FI E- 'cossrn snnsnr'ao qcgnrrr, or wooivsooxnr, axons ISLAND, sssrozvon, BY MESNE ssremsn'rs, 'ro rim ivorssnsss 'rmwnrrsa company, or mmnLErowN,

comat e, A 9 203439X Q1 WNEC Q ESCAPEMENT MECHANISM FOR TY PE-WRI'IING MACHINES.

Specification of I cttcrs Patent.

T all whom it may concern:

Be it known that I, JOSEPH A. RONCH'E'I'I'I,

' a subject of the King of Italy, residing at upp rtains to make and use the s me- This invention relates to typewriting machinesand more particularly to escapement mechanism for a machine of the type designed to effect printing withoutproducing noise. In typewriting machines as hitherto constructed the' greater part of the noise incident to the operation thereof has been produced by the clickin of the various parts employed to effect t e spacing of the carriage, and one of the objects of my present invention is to provide new and improved means for overcoming this objection, and

such as willrender the operation of the carriage feeding mechanism. substantially noiseless.

Another object of the invention is to provide, new and improved means for actuating the feed dog of an escapement mechanism.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention, accordingly, consists in the features of construction, combinations of elements and arrangement of partswhich will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated inthe following claims.

In the accompanying drawings wherein is illustrated two 'of' various possible em bodiments of my invention, Figure 1 is a plan view illustrating the preferred embodimcnt thereof; Fig; 2 is a viewin side eleva tion' of the mechanism-illustrated in- Fig. Bis a sectional view on .li'n'e 8-3:of

;- 'FigLj 1, looking; in=. the direction -of the armoved downwardly;

ectivelyshow in lan wir'ocker memberfcarnying the feed doglisl' Fig. 6 is a sectional view on line 6-6 of Fi 4, looking in the direction of the arrow; Fig.7 is a sectional view on the same line showing the escapement wheel in an intermediate position; namely, the position assumed when the movable fecd dog has been depressed and before the escapement wheel has been allowed to rotate to its normal position of rest; Figs. 8 and 9 are plan and side views respectively, of the escapement mechanism showing the intermediate position upon the return stroke of the movable do the escapement wheel not'having been a lowed to rotate to its normal position of rest; Fig. 10 is a sectional view taken on line 1010 of Fig. 8; Fig. 11 is a view in elevation and plan of a difierent embodiment of the escapement mechanism; Fig. 12 is a view in side elevation of this embodiment; Fig. 13 is a view in section taken on line 13-13 of F ig. 11; Figs. 14 and 15' show plan and side views of the esca'pement mechanism employed in this embodiment-of the invention and the position assumed by the parts hefore-the feed dog has reached the limit of its downward stroke; Fig. 16 is a sectional view taken on line 1616'of Fig. 14. Similar reference characters refer to similar parts throughout the various views of the drawings.

Referring now to the preferred embodiment of my invention illustrated in Figs. 1 to 10 inclusive, 1 designates a portion of the frame of the machine provided with ln s 2 each of which carries a pivot screw 3. T ese pivot'screws support an oscillating rocker member 4 provided with trunnions 5 and 6 respectively, said rocker being also rovided with an arm 7 to which. is pivoted t 6 link 8 whose other .end is connected to an arm 10 extending-from the universal rock shaft 11.

This latter shaft is oscillated by the key levers or.space bar, as will be understood.

The-.rockrmember 4; is provided with a 'rcarwardly projecting portion '12, which is provided with raised-friction portion 13; a similar raised friction -vided upon arm 7-. The movable dog portion 14' is pro- I 15 is loosely-mounted upon a trunnion 16 of the rocker. member and bears against the two ,-ra1sed=port1ons=13 and 14 thereof, being pressed into engagement-with such raise Patented Jan. '7, 1913.

ortions by a spring 17 pressingeagainst the ub of the-do and interposed tween said hub and an a ustable nut 18 threaded upon the rocker member. .The movable do 15 is ,5 bifurcated'at its outer end 'to'provi e the two projecting fingers 20 and 21 respectively, said fingers bein wide at the top as shown, and narrow at t e oint adjacent the space 22 between them, t is feature of construction being clearlyv shown in F i 3 of the drawings. The escapement sha t is shown at 24 and is rovided with an escapement wheel 25. This wheel is provided with two sets of escapement teeth, one set being provided ugon 'each of the lateral faces of the wheel a jacent the periphery thereof. The lower teeth 26 are provlded with relatively short, radial, fiat faces 27 and between these teeth the surface is flat as at 28 at the central portion thereof and curved at the ends, as shown at 30, the curved portions merging into the flat intermediate portion and the fiat engaging faces of the teeth. The upper teeth. 31 are also provided with flat or straight surfaces as at 32 and curved portions 33, the portions of the wheel intermediate said curved portion being substantially flat as shown at 34. The enga ing face 32 of each of the upper teeth is s ightly offset from the engaging face of the correspondin lower tooth and 13 disposed behind it wit respect to the direction of normal rotation of the escapement wheel. The engaging faces of the fingers 20 and 21 of the movable dog 35 15, which are formed flat, are in alinement, the rear faces 35 and 36 of fingers 20 and 21 being-beveled as shown-to engage with the correspondingly beveled rear or receding faces of the teeth of the escapement whee. The escapement wheel 25 is also provided with a plurality of teeth 37 upon its periphery said teeth being adapted to be engaged with a pawl or dog employed in back spacing mechanism, not s own. Having described the construction of the mechanism constituting this embodiment of my invention, the operation thereof may now be understood.

It will be understood that the escapement wheel 25 is normally ur ed to rotation in the direction indicated by t e arrow in Fig. 1 as, for instance, by means of the usual carriage propelling spring acting through the carriagerac and the pinion mounted upon the 66 escapement shaft 24, these latter parts not being shown. The several parts constitutin I the escapement are shown in their norma positions of rest in Figs. 1, 2 and 3 of the drawin in which'tooth 88 is in engage eoiment with a finger 20 ofthe vibratory feed and' consequently the feed dog 15 is j, pressed againstthe friction faces 13 and 14. 1. Z'ofarm? of the .rocker member, the pressure finger 41 ii{ e xerted .between theseFarts-being pro or- 'tlonalto. the amount 0 tension exerte by the propelling spring acting through the escapement wheel plus the tension of the coil spring 17.

When the universal shaft 11 is oscillated, rocker 4 will be depressed to the position shown in Figs. 4 to 6 inclusive. In this position, finger 20 will be disengaged from the tooth 38 of the escapement wheel, and the upper finger 21 will be forced downwardly against the bottom portion of the space between the teeth 31, as shown in Fi 7. The escapement wheel being thereby released and continuing its rotative movement, Wlll cause the finger 21 to ride up the curved portion 33 of the escapement wheel, the finger finally reaching the posit-ion shown in Fig. 6, whereupon further rotative movement of the escapement wheel is restrained. The riding of the fin er 21 up the curved surface 33 retards t e rotative movement of the esca ement wheel, and the engagement of said nger with the straight face 32 of the tooth 40 of the escapement wheel being gradual, no noise is produced during this operation. When the universal rock shaft is moved in the o posite direction, the rocker member will be moved upwardly to the position shown in Fig. 2. The operation of the vari- 0118 parts durin this upward movement of the rocker'mem er are as follows: After a portion of the upward movement of this part has been consummated, the inner portion of the tooth 20 will strike the bottom of the space between the teeth as it moves from the position of Fig. 6 to that shown in Fig. 10. When this engagement occurs, the

rocker member 4 maycomplete its full upward stroke to the osition showninFig. 2. The escapement w eel, meanwhile, rotates and is frlctionally resisted by the tooth 20 'not only while the-same is sliding upon the flat portion 28 between the adjacent teeth, but also in' striking the curved-portion 30 of the next tooth. While sliding over the curved portion 30, the finger 20 will be forced outwardly. to the position of rest shown in Figs. 1, 2 and 3. This resistance to the rotative movement of the escapement wheel causes thatwheel to be arrested noiselessly and without shock to any of the parts.

Referring to Fig.1, it will'be seen that the offsetting or staggering of the engaging faces of teeth 38 and 40 permits of the slight drop of the carriage during the downward rnoyement of' the finger 21. This distance 1s Justsufiicient to enable tooth 20 to pass over the end of tooth 38 during the upward movement Ofthat fingery'as is clearly illustrated in Fig. 3. f a r. h

" In the embodiment ofmy invention illustrated in'; Figs.'Z1-1to 16 inclusive, the movable: dog. 15 'is provided with the single wh1ch-is-beveled atits upper and lower edges, as at'42and 43, and provided with flat engaging faces tet and 45' respecflat portions of the faces of the teeth 46 and-1T respectively. The teeth 46 are carried a by the upper escapement wheel 48 and the 5 teeth 4'2: y the lower escapement wheel 5.0, both being secured to the escapement shaft 24, theid stance between the points of the teeth of the two escapement wheels being somewhat less than the extreme width of the escapemeut finger 41. The teeth 46 of the upper wheel 48 are provided with curved intermediate portions 51, and the teeth 4'? of the lower escapement wheel are similarly provided with curved portions 52 and tlat engaging faces 53, the portion of the Wheel intermediate the curved portions being preferably substantially fiat as shown. The feed dog 15 is carried upon the rocker member in a manner similar to. that shown in'thc first described embodiment of the invention. The 0 eration of this embodiment, which shou d be readily understood in view of the above description, is substantially as follows: The parts constituting the escapement mechamsm occupy their normal ositions of rest in Figs. 11, 12 and I 13. .Wien. the rocker 4 is swung downwardly, the frictional resistance again t the movable. dog causes that dog to move downwardly until the tooth strikes the bottom .between the teethof the lower escap'enient wheel, then the escapement wheel comes adually against the tooth 47 as shown n Figs. 14 to 16 inclusive, the rocker 4 being permitted to continue its downward movement owingto the frictional contact 'between the same and the feed dog. When the rocker member 4 swings upwardly to the position shown in Fi 12, the tooth 44 first strikes the bottom 0 the space between the teeth of the up er wheel 48 and that wheel is brought gra ually to rest until the parts assume the position shown in Fig. 13. The operation of this embodiment of my inventron, as will be understood, is similar to that shown in the embodiment hereinbefore described, except that in the present instance the do is provided with a single finger cooperating with the double esca ,emcnt wheel, whereas in the first dcscribet embodiment the feed dog is bifurcated and a single escapement wheel carrying two sets of teeth is employed. a

When the escapemcnt wheel is rotated backward as by means of pawl, not shown, cngagin with the circumferential teeth 37, the beve ed. rear portions 54: and 55 of the teeth will strike the beveled portions 42 and 43 of the fingers, forcing the feed up: cowardly anddownward againsttbe frictional ws e au d by he ct on a SP -H1817 l against doig. 15., thus allow ng the escapm ,n enqwhec to-be moved back. totbe extent. ffinqonmore teeth if desired.

tivelyn These flatfacesbear ag ins the- .jects, is constituted b h. l. treaswillrasc ias yrhe se n that I have vid d e ep n m qhanisa p ul f x well a apt d t et am, am ng her the ends (1 objects above pointed out n. an excee ingly simple yet eflicient manner.

The embodiments of the invention herein described, for carrying the various obcom arativel few parts, thereby diminisiing t e liability of any part-becoming deranged. It will be obvious that since no impact or concussion of the. arts takes place during the operation of tlib escagement mechanism, no noise can be produce and yet the parts are arrested accurately and positively in their various positions.

As many changes could be made in the above construct-ion, and many a parently widely different embodiments of t is invention could be made, without departin from the scope thereof, it is intended that a l mattercontained in the above description or shown in the accom anying drawings shall be interpreted as illiistrative and not in a imiting s nse- Havlng described my invention, what I claim as new and desire to secure by Letters Patentis:

1. In an escapement mechanism, in combination, a member to be spaced provided with teeth having flat faces and curved portions interposed therebetween, and an e scapement member cotiperatin with said teeth and curved .ortions where ythe movement of the movagle part i' silently arrested.

2, in an escapement mechanism, in comhinat on, a member to be spaced having curved portions separated by teeth having flat face and anvescapementmember cooperating with said, curved portions and teeth of the member to be spaced and adapted to space the same.

3, in an escapement mechanism, in comhinatlon, a memberlto be spaced having on ed portions which merge into teeth providdd with straight faces, and an escapement member cooperating with said teeth and curved portions and adapted to space said first-mentioned member whereby its movement is silently arrested.

4.1a an esca .ement for typewriting machines, the com ination of a member to be spaced, having curved portions which merge into, teeth provided with straight faces, and an escapernent member adapted to enga e with said curved ortions to retard t e movement of said rat-mentioned member and to engage with said teeth, whereby said member 1 s restrained against movement af r e dati ,5- In n assessme mech ni n maaaa a a el p ts beame p o ide i hitaa h h vmsc mtl at aisdmt a w s h s pa ate. th eth, he l t er hams straight. ace restless n n c I lating eseapement element adapted "to enigage' with said curved portions to retard the fm'ovement of the spaced member, and to writing mac ines, the, combination of a member to be spacedwhich is normally a' movable dog provided with fingers, said fingers being adapted alternately to engage with'teeth upon opposite sides of said cswriting machines, the combination '0 .urged tomovement, and having a plurality of flat-sided teeth separated by curved intermediate portions which merge into said teeth, and an eseapement element which first engages said curved portions to retard the movement of the member to be spaced, and then engages said teeth to arrest the movement thereof.

7. In eseapement mechanism for typewriting' machines, the combination of a member to be spaced provided on its lateral faces with op ositely disposed teeth, and'a movable dog having fingers cooperating with said teeth whereby said member may be spaced.

. 8. In .esca ement mechanism for type- 1 writing mac ines, the combination of an eseapement wheel provided with 0 positely disposed teeth upon its lateral si es adjacent the periphery thereof, and a movable dog having fingers for engaging said teeth. 0. In eseapement mechanism for t pe an eseapement wheel-provided upon its lateral surfaces adjacent the periphery thereof with a plurality of oppositely.'d1sposed teeth, and

capement wheel, whereby the latter is spaced. 10. In an eseapement mechanism, the com bination of an eseapement wheel having laterally extending teeth provided adjacent the periphery upon opposite sides thereof, said teeth being arranged in staggered relation, and a movable dog provided with fingers each of which is adapted to engage with'the teeth upon one side of said escapernent wheel, and means for oscillating said dog whereby said fingers are alternately engaged with said teeth.

11. In'an eseapement mechanism for typewriting machines, the combination 0 an eseapement wheel providedupon its lateral surfaces adjacent the periphery thereof with a plurality of teeth, said teeth being provided with fiat faces and ,curved intermediate "portions and saidintermediate portions having flat portions interposed." be-- tween, a movable dog-provided with fingers lating saiddog. 1 7, In an eseapement mechanism for type- .wrlti'ng machines," the combination of an of said teeth to positively arrest rotation thereof.

'12. In an eseapement mechanism for t ewriting machines, the combination 0 an escapementwheel having radially arran ed teeth rovided upon its lateral sides adiacentt e eriphery-thereof, said teeth having straig t working faces and curved separating portions, an oscillatory feed dog having fingers which straddle said escapement wheel and coiiperate with the teeth thereof, and means for oscillating said dog whereby said teeth are alternately enga ed, first wit said curved o'rtions to retar the rotative movement 0 the eseapement wheel and are then engaged with the straight faces thereof to restrain the eseapement wheel against rotation.

13. In an eseapement mechanism for t pewriting machines, the combination 0 an eseapement wheel provided with radially arranged teeth upon its opposite lateral faces adjacent the periphery thereof, said teeth having flat engaging faces and curved intermediate portions, and an oscillatory feed dog having fingers which straddle said csca ment wheel, and frictional means for os'ci lating said dog whereby said fingers are first engaged'with said curved portions to retard the rotative movement of said escapement wheel and are next engaged with said *fiat faces to restrain the movement thereof.

- 14. In an eseapement mechanism for t pewriting machines, the combination 0 an eseapement: wheel provided with teeth upon its lateral surfaces, said teeth being radially arranged adjacent the periphery thereof, an oscillator 'do provided with fingers to straddle sai teeth, and means for oscillating said dog to alternately engage said lingers with said teeth.

' 15. In eseapement mechanism for typewriting machines, the combination of an eseapement wheel provided with radially arranged lateral teeth upon its opposite sides udjacent the periphery thereof, an oscillatory dog having fingers which straddle said escapement wheel, and frictional means for oscillating said dog whereby said fingers are alternately engaged with said teeth.

16 In an eseapement mechanism for typewritlng machines, the combination of an eseapement shaft having means carrying oppositely disposed teeth extending in the direction of the eseapement shaft, or. oscillatory feed dog adapted alternately to engage with said teeth, and means for oscilescapement wheel having'teeth'upon its oppc'site'sides adjacent the periphery thereof, .a bifurcated feed dog cotiperating with said teeth, and-means actuating said feed dog whereby the bifurcated portions thereof are alternately.engaged with said teeth.

" the teeth of said escapement wheel, and action, an oscillatory feed dog a apted to cooperate with the teeth of said escapement wheel, and means frictionally engaging said dog adapted to actuate the same, said dog tuating means for said dog frictionally engaged therewith.

'19. In an escapement mechanism for typewriting machines, the combination of an escapement wheel provided, with lateral] extending teeth uponits opposite sides a jacent the periphery thereof, a vibratory feed dog, said dog being bifurcated to provide fingers which are adapted alternately to engage-with the teeth on opposite sides of said escapement wheel, an actuator for said dog, and means for maintaining said actuator and said dog in frictional engagement.

2051a escapement mechanism for t pewriting machines, the combination 0 an escapement wheel .normally ur ed to rotabemg urged into engagement with said lastmentioned means by said escapement wheel.

21. Man escapemcnt'mechanism for typewriting machines, the combinat1on-of an escapement wheel normally ur ed to rotation, an oscillatory feed dog a apted to cooperate with the teeth of said escapement' wheel, and means frictionally engaging said dog to actuate the same, the friction between the movable dog and said actuating means being proportional to the pressure exerted upon said (log by the'escapement wheel.

22. In an escapement mechanism for typewriting machines, the combination with an escapement wheel having oppositely disposed lateral teeth arranged adjacent the eriphery thereof, an oscillatory feed dog Raving bifurcated portions adapted to cooperate with the teeth of said escapement wheel, and an actuator frictionally engaging said dog adapted to oscillate the same the friction between the movable dog and the actuator being proportional to the pressure exerted upon said dog by the escapement wheel.

23. In an escapemcnt mechanism, in combination, a member to be spaced having curved portions which merge into teeth provided with straight faces, an oscillatory do adapted when oscillated first to engage sai curved portions to retard the movement of the member to be spaced and then engage the straight faces of the teeth to restrain said member against movement, and means frictionally engaging said dog adapted to oscillate the same.

24. In an escapement mechanism for typewriting machines, the combination with a member to be spaced provided with o ositely disposed lateral teeth, the latter having straight faces separated by curved intermediate portions which merge into said straight faces, a bifurcated feed dog adapted alternately to engage first with the curved portions between said teeth to retard the movement of the member to be spaced and thenengafie the fiat faces of the teeth to restrain suc movement, and an actuator frictionally engaging with said dog and adapted to oscillate the same.

25. In an escapement mechanism for typewriting machines, the combination with a member to be spaced which is normally urged to movement, said member being provi ed with a plurality of teeth, an escapement element cooperating with said teeth to space said member, and an actuator frictionally engaging said escapement element to vibrate the same, the friction between said actuator and said escapement element being proportional to the pressure exerted upon the latter by the member to be spaced.

26. In escapement mechanism for type writing machines, the combination with an escapement wheel provided with oppositely disposed lateral teeth, said escapement wheel being normally urged to rotation, 21. vibratory feed dog having fingers ada ted alternately to engage with said teet-i whereby said escapement wheel ma be spaced, a rocker member carrying sai vibratory dog, the latter being loosely mounted thereon, a frictional actuator carried by said rocker member, and spring means for maintaining said dog and said actuator in frictional engagement. 27. In escapement mechanism, in combination, an esca ement shaft normally urged to rotation, a urality of sets of escapement teeth mounte upon said shaft, a rocker member, a do adapted to be oscillated thereby and move% from one set of teeth to another to dpermit the shaft to rotate step by step, an cam means associated with said .sets of teeth mounted upon said shaft whereby the rotative movement of said shaft is silently and gradually arrested without impact or concussion.

28. In an escapement mechanism for t pewriting machines, the combination 0 an escapement wheel havin laterally disposed esca ement teeth exten ing in a direction para lel with the axis thereof and back spacmg teeth located upon .the periphery of said wheel.

29. In an escapement mechanism for t pewriting machines, the combination 0 an esca ement wheel having laterally disposed teet arranged'ad'acent the peri hery thereof, and a friction. ly actuated vi ratory feed dog having fingers cooperating with said teeth to space said escapement' wheel, said' nation of an escapement wheel provided with a plurality of teeth having straight working faces and beveled 0 posite faces with curved portions there etween for silently arresting the movement of the escapement wheel, and a vibratory feed dog having a straight enga ing face and a face beveled to engage the eveled faces of said teeth.

31. In a typewriting machine, the combination of an escapement wheel provided with a plurality of laterally extending teeth, the working faces of which are straight and the opposite faces thereof are beveled, said teeth having curved portions therebetween for silently arresting the movement of said escapement wheel, a vibratory feed dog rovide with means for en aging the straig t portions of said teeth, t e engaging portion of said dog being strai ht an t e opposite face thereof being beve ed to engagewith the beveled portions of said teeth, whereby the escapement wheel may be freely moved in a reverse direction.

32. In an escapement mechanism, in combination, an escapement wheel an oscillatory member, a dog movable therewith, and

means to yieldingly press the dog and the member into contact transversely to their oscillating movement.

33. In a typewriting machine, the combinationof an esca ement wheel, an oscillatory member, an a loosely mounted dog spring-held in frictional engagement wit said member adapted to coact with said escapement wheel.

34. In a typewriting machine, the combination with a rack member adapted to be spaced, an oscillatory member, and a loosely mounted dog held in frictional enga ement with said member and dependent or its movement upon its frictional contact with said member.

35. In a typewriting machine, the combination of an esca ment wheel having teeth thereon, an oscil atory member, and a do held in frictional engagement with sai oscillatory member ada ted to coact with said teeth, said teeth having curved portions therebctween with which said dog coacts silently to arrest the movement of said escapement wheel.

. In testimony whereof I afiix my signature, in the presence of two witnesses.

JOSEPH ALBERT RONCHETTI.

Witnesses:

ARTHUR J. B. Henson, ROYJ. Sounaa.

copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents, Washington, D. 0." 

